Python advanced programming, python Advanced Programming

Python advanced programming, python Advanced Programming
1. =, is usage

Summary

· Is to compare whether two references point to the same object (reference comparison ).

· = Is to compare whether two objects are equal.

2. Deep copy and light Copy 1. Light copy

A shallow copy is a top-level copy of an object.

The general understanding is that the reference is copied and the content is not copied.

2. Deep copy

Deep copy is a copy (recursion) of all layers of an object)

Further Understanding 3. Other methods of copying

The copy of an immutable type is different from that of a mutable type.

· A multipart expression can assign values to a sequence.

· The dictionary copy method can copy a dictionary.

· Some built-in functions can generate a copy (list)

· Copy function in the copy Module

3. Add the getter and setter methods to the property property1. use the property to upgrade the getter and setter methods.
Running result:
Running result: 3. Replace the getter and setter methods with property.

@ Property becomes an attribute function. You can perform necessary checks when assigning values to attributes, and ensure that the Code is clear and short. It has two main functions:

· Convert the method to read-only

· Implement a new attribute setting and reading Method to Determine the Boundary

Running result:
Running result:

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